The best price for getting anti-mosquito bed nets to the poor proves to be "free".
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/good-news-malaria-control
[2] http://admin.indiaenvironmentportal.org.in/category/author/jeffrey-d-sachs
[3] http://admin.indiaenvironmentportal.org.in/category/journal/scientific-american
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/malaria
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-care
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vector-control
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vector-borne-diseases
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/aid
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/poverty
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/unicef
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa